/diy/ - Do It Yourself

>>1921632
you want something done right, do it yourself
the one with the most outputs is the one you can build yourself out of 2n7000 mosfets, works beautifully and is infinitely scalable, 2n7000s are stupid cheap, get them from aliexpress or ebay or whatever

you just need an ams1117 3.3v regulator for the 3.3v source

>>1636507
I assumed you knew earlier, but are you familiar with these? Bidirectional logic level shifters.

>>1598084
Just use a normal mosfet and a couple of passives, pic related. You'd hook it up so the "3.3V" line is the Vcc of the slave that may have its power cut, so if that "3.3V" line hits 0V no current can flow. Would that work? Try simulating it in falstad or spice if you're unsure.